Method and apparatus for adaptive sharpening of images

Details Method and apparatus for adaptive sharpening of images Method and apparatus for adaptive sharpening of images

1991-07-22

1996-06-04

Mancuso, Joseph

Image analysis

Image enhancement or restoration

Image filter

G06K 940

Patent

active

055241620

ABSTRACT:
A method and apparatus for adaptively sharpening an image includes dividing the image area into smaller sub-areas each containing a sub-image, and adaptively sharpening each sub-area image individually. That is, the sharpening factor SF, and the blur area are automatically and adaptively set differently for each individual sub-area image of the original photograph. The sharpening effect is thus improved over the entire image area since each sub-area image of the original image is sharpened in accordance with the amount of sharpening needed. Areas with more detail needing more sharpening, would receive more sharpening, while other areas such as gray sky, receive almost no sharpening.

REFERENCES:
patent: 4053934 (1977-10-01), Kornreich et al.
patent: 4319268 (1982-03-01), Yamada
patent: 4703349 (1987-10-01), Bernstein
patent: 4747052 (1988-05-01), Hishinuma et al.
patent: 4794531 (1988-12-01), Morishita et al.
patent: 5001573 (1991-03-01), Sakamoto et al.
patent: 5038388 (1991-08-01), Song

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